Offer Downloadable Version of Codex

It’d be very helpful to me to be able to download the codex. I’m often working in situations where I don’t have internet access, so I have to dig through other plugins/themes I have installed and the WP source to figure out function parameters, etc. The codex is built using wiki software, so I’m assuming it’d be really easy to offer a download. Even if it was a few versions old it’s still be very helpful.